PlanetScale Boost is a state-of-the-art partial materialization engine that improves the performance and throughput of SQL queries by up to 1,000×. It runs alongside a PlanetScale database and uses a caching architecture that is more performant than a cache and more efficient than a materialized view. When a query is executed, it plans how to process the data on writes instead of reads, making writes hard and reads simple. The system keeps intermediate state to maintain partial views efficiently, which helps resolve misses by querying into it. PlanetScale Boost can also run in reverse, allowing it to query into its own state for optimal performance. Its performance is O(1) on average, with a focus on reliability and consistency with the underlying database. A limited beta of PlanetScale Boost is now available, and users can sign up for more information.